/*!	 synfig/rendering/surface.cpp
**	 Surface
**
**	......... ... 2015 Ivan Mahonin
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#ifndef _WIN32
#include <unistd.h>
#include <sys/types.h>
#include <signal.h>
#endif

#include "surface.h"

#include "common/surfacememoryreadwrapper.h"

#endif

using namespace synfig;
using namespace rendering;

rendering::Surface::Surface():
    width(0),
    height(0),
    created(false),
    is_temporary(false)
{ }

rendering::Surface::~Surface()
{
    destroy();
}

void
rendering::Surface::mark_as_created(bool created)
{
    this->created = created;
}

void
rendering::Surface::set_size(int width, int height)
{
    assert(!is_created());
    unset_alternative();
    this->width = width > 0 ? width : 0;
    this->height = height > 0 ? height : 0;
}

bool
rendering::Surface::create()
{
    unset_alternative();

    if (!is_created() && !empty()) {
        created = create_vfunc();
    }

    return is_created();
}

bool
rendering::Surface::assign(const Color *buffer)
{
    return assign(buffer, get_width(), get_height());
}

bool
rendering::Surface::assign(const Color *buffer, int width, int height)
{
    return assign(SurfaceMemoryReadWrapper(buffer, width, height));
}

bool
rendering::Surface::assign(const Surface &surface)
{
    destroy();
    unset_alternative();
    set_size(surface.get_width(), surface.get_height());
    created = assign_vfunc(surface);
    return is_created();
}

bool
rendering::Surface::assign(const Handle &surface)
{
    if (surface) {
        return assign(*surface);
    }

    destroy();
    return false;
}

void
rendering::Surface::destroy()
{
    if (is_created()) {
        unset_alternative();
        destroy_vfunc();
        created = false;
    }
}

bool
rendering::Surface::empty() const
{
    return width <= 0 || height <= 0;
}

size_t
rendering::Surface::get_buffer_size() const
{
    // TODO: check limits
    return empty() ? 0 : get_pixels_count() * sizeof(Color);
}

bool
rendering::Surface::get_pixels(Color *buffer) const
{
    return is_created() && get_pixels_vfunc(buffer);
}